Universal icon styling

[bszonye]

With #24 resolved, you can now layer Map Tacks on top of NQ/CQUI and other general UI mods. Those mods have different icon options (notably the individual wonder icons, see #19). Thus, player maps might have icons outside the currently supported range. The typing and styling fuctions (MapTacksType, MapPinFlag.SetColor, MapPinFlag.SetFlagUnitEmblem) should recognize and adapt to a wider range of icons: at least wonder icons, and ideally anything that could reasonably fit on a pin head.